style(formatting): Run rustfmt

examples/transport_file.rs

@@ -1,20 +0,0 @@
-extern crate lettre;
-
-use lettre::transport::file::FileEmailTransport;
-use lettre::transport::EmailTransport;
-use lettre::email::EmailBuilder;
-
-
-fn main() {
-    let mut sender = FileEmailTransport::new("/tmp/");
-    let email = EmailBuilder::new()
-                    .to("root@localhost")
-                    .from("user@localhost")
-                    .body("Hello World!")
-                    .subject("Hello")
-                    .build()
-                    .unwrap();
-    let result = sender.send(email);
-    println!("{:?}", result);
-    assert!(result.is_ok());
-}